A History Of Infantry Firearms Calibres

    Why did we end up with a calibre of 5.56 mm (and others with 5.45 or 5.82 mm)? The understanding of modern infantry firearms calibres requires in part an understanding of their history.
    The typical European 18th century service long firearm was a musket. The calibres were astonishingly large, and the typical bullet was actually a spherical ball. Cartridges were introduced, typically paper with ball and blackpowder, and de-mixing of the blackpowder over time was an issue.

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    Steve Johnson

    I founded TFB in 2007 and over 10 years worked tirelessly, with the help of my team, to build it up into the largest gun blog online. I retired as Editor in Chief in 2017. During my decade at TFB I was fortunate to work with the most amazing talented writers and genuinely good people!